Adjustable pulley



M.IL. HUDSON.

ADJUSTABLE PULLEY.

APPLICATION f lLED APR. s. 192|.

1,405,590, Patented Feb. 7, 1922.

different sizes.

[narran `s'rrilES.

rMontafon L .l HUDSON, oFacAN'ToN, NORTH QARQLIN' fADJUs'rABLi-i PULLEY; A

ToaZZ whom it may concern.'

'- Be it'knownthat I, MoULr-ON L. HUDsoN,

a citizen of the United States, residing 'at Canton, in the county of VHaywood and State of North Carolina, 'have invented cervtain new and useful Improvements inv Adjustable Pulleys,' of which the; following is a specification, reference being hadr to the accompanyingA drawings. Y

This invention relates to pulleys,fband Aparticularly to those 'rotary elements of this character adapted to `be mounted upon shafts and which are; adjustable tosuit different sized shafts. i Y

VThe general object of this present* lnven- .tion is to provide a pulley or like mechanical element with Ameans whereby it may .be readily adjusted and carriedupon shafts of A further Objectis Ito provide means of this character which permits thepulley to fit a plurality of different sizes of sliafting and which may be readily "and quicklyfadjusted from one size to Vanother and without in any way weakening the pulley or weakening its bearing upon the shaft;

And a further object is to provide a pulley of vthis character having ahub .provided with -an` elongated chamber orv shaftway through it, and provide rotatable bearing members in this Yshaftw'ay vadapted to kbe shifted to a plurality of different positions in order to engage different sizes ofkshaft. ,Other objects will appear in the course L My invention is illustrated in thev accompanying drawings, wherein :-4 i

Figure 1 is a transverse sectional view through a pulley constructed in accordance with my invention;

. F'gure 2 is a section on the line2-2 of FigureY 1 j Figure 3 is a fragmentary section-through the hub of the pulley intersecting the groove 19;

-Figure 4 1s a cross section.I on theline 4 4 of Figure 5;

Figure -5 1s an elevation of the bearing vmember shown in Figure 4;

Fio'ure V6 isa cross section of the bearing member 24a; Y

Referring :to these drawingsfitV will be `*seen that Ivhave illustrated a pulley which isadapted to be adjusted to three different vsizesof shaft, knamely to shafts having 3 Specication ofnLertters Patent.` v

'any other wheels whichA vga euwith the'shaft. j

" he hub portion 1Qv projects on each side diameter',l 5' diameter,y and 1 1g diameter.

the weightfof the pulley'j Itis to be underj n ratentea'neb. 7,' 11922. Application med Apri; 6,1921. serial No. 458,915.)

stood,' however, that'the particular,construe y tion'yof this-pulley, bandwheel,l or like element forms nopart of my present invention and that'the means "whereby j'this element maybe clamped upon a shaftfis.equallyap-Vv plicable to `gear Wheelsjfriction wheels, or

isdesired to enbeyond the web 11 and isf-formed with a i 'diametrically-extending,' relatively wide slot y formed to' provide a central rpassageway 14 and twoend passageways 15. The end pas- 'sageways are approximatelyr vsectors of. ai. clrcle and intersect the'circular central pasi:

sageway 14.' The central passageway y-14i'n a pulley intended to be used' onA 1, vand gli" shafts 4islapproximately 1 in diameter. The passageways 15 under these circumstances will have va vdiameterl of' approximately 14.. 1 Eachof the passagewaysfor i chambers' 15 isformedvwith a plurality of yaxially yeirtending keyways r16, 17' and -18 extending through the rentire length of the hub,and extending from the keyway y16 to f the keyway 18 and disposed .approximately midway of thelengthof the hub is a cir- *cumferentiall-y extending grooveV 19 "having depth approximately the samev as the depth of the keyways.` AExtending throughl 'y the` wall surrounding'thefchambers 1.4 and 15 are three screw-threaded openings 20' which intersectthe keyways '16,1 117. and 18, and also extending through the opposite edto be disposed through the openings 20,

yend walls and extending into the chambers or passageways 15'y are the screw-thr'eaded` vopenings 21. Clampin'gscrews22'area'daptand screws* 23 .are adapted to" disposed p through the kopenings V21'.

Adapted to be disposed in each Vof thevr chambers or passageways 15 are the; shaft engaging members 24a-nd 24. The mema longitudinally eid/,ending keyway 28. The Y i tends inward-fromthercurved face 25 andV outer faces of the Walls between .theserecesses or bearing'. faces 25, 26and27 are con-y vexly rounded, as'at 29,V to fit the inner face ofthe chambers and one ofjheouter curved faces 29 is longitudinally grooved, as at 30. A screw-threaded aperture 31 extwo intersecting. screw-threaded apertures `31HL extend centrally inward from the faces 26 ,andp27- y From thel keyvvayV 30 extends a sr'frew-'tlireaded aperture 32 which intersects the 4apertures extending ,inward from the rfaces 26 land 27, las illustrated in.Figure 4.

Projectingfrom ,one ofthe curved faces 29 is a,lu g 33 which is adapted to engage in the gro0ve19. y.Thebearing member24a is of exactly the, same character as"` the bearing '.member 24, vand is'also provided with the f i -1ugi33 but 'is'. notl formed withthekeyways 28. ,Itis, however, formed on one .of its Wintgsor Walls 4vwith thelongitudinally exten ingkeyvvay 30. Itis not formed with the perforations 31 andq32intersecting per- .forations ,.31a A.extending .inward from .the

faces v2.6 A.and 27.

The bearing membersV 24- and 24.l .have -theirvbearing facevon the Same radius, that is the faces ofthe member24a have the same yradius asv the concave faces of `the bearing member 24,and by-.shifting these bearing .members 24fand2r4 ,Withinthe chambers 15 lso ,as to bring their corresponding bearing faces ,oppositeA each other, the shaft aper- `mentwwhich is under consideration.

fare screw-theaded apertures 20,'Which intersect each of the three keyWays 16, 17 and 18 `turemay-lbe Areduced or increased Aifrom 5,1 to an inch inthe size of pulley or like-ele- There in the chambers 15,; and the end .walls of the `chambers 15 are each formedwith the screw- `threadedapertures'21 disposed to one side of the adjacent screw-threadedl aperture 20.

f In the use of this device, themembers 24 -and.-24are placed in position with the lugs33 in engagement With'the groove 19 and then these umembers 24. .andf24 are roftateduntil the. desired bearingffa'ce 25, 26 o1' 27 facesthecentra] `shaft opening. For in- 4 .stanee,i f it isdesired thatvthe pulley shall be V a plled .to-a Ishaft -1 f in diameter, the.

mem ers .-24 and-245. are turned :so that the V.faces-26 Iconfront eachA other and form the .Wu'fiihe .Shaft Opening. Under these circumstances, the keyways 30 ofthetwomembers 24 and 24a will-.aliguwith the keyways 318 and then the keysil'areinsertedto lock themembers 24 and.24 Vintheir..adjusted pesitiops. The screwsef22iareitheninserted thrpugh' the corresponding screwethreaded opemagsiandimpmge uponfthe keys 34- sonias to bold `,these; keys imly in place and .Serew being adapted t0 exten used to `l `leek theshaft key gin place, Athis through pulley as desired an is essential.

vshaft key 35. ItV extends through the aper-V ture Y20.1adjacent the-aperture 21Wnen the member 24 is turned so as to bring the face It Will be seenthat I use three keys and three set screws for holding the Aadjustable bearing members in placeand holdingthe pulleyIl.placeupon a shaft, and it will likewise be obvious that no bushingis required or any` fitting. `up of the pulley:v before the same is put on .the shaft. Y It will be obvious that the pulley vcan-.be madein 'any size, bore, diameter, .or Width or any .style desired, .and that` While'I have illustrated la pulley adapted 'tothree different sizesf-of shaft, a larger. pulleyv may be adapted tof tit four different sizes. ofshaft VIt islikewise obvious that the pulle may. beleither a split which I have provided. does .not Weaken .the

, pulley in anyway. `The change in the adjustment of the pulley can beV made invfve rminutes or less and this-,feature proves .very

valuable in break-down jobs where .speed y, While .I .have illustrated certain detain of construction. and arrangement (if-parts, it will bev obvious. that the .prineipleofr the invention may be embodied inzother `forms .without departing .from vthe spiritfof the invention.

.I claim ,1. A rotatable .element havingfa hub soy that Vthe adjustment Y formed With ashaft passage, apairof 'pasV sages circular inv.."`ci'oss Vsection,extending` formed to provide .a shaft passage, a pair vof passages parallel :te and .intersecting vthe shaftpassageand formed with a plurality 2..'A rotatable velement .having a'vhugb lio of longitudinallytextending keyways, bearing members .rotatively disposed innthe'last named passages and Ahaving a plurality #of concave bearing faces of Ydifferent'curva-V tunes, .keyways disposed in saidmembers and adapted to coact with the keyvvays in -j-the Y assages, keys. adaptedtobe linserted'in said v eyways, and lmeans Yfor holding'said keys in place.

y3. A rotatable *felement having Va hub formed to provide a shaftpassage, a pair of lpassages parallel i to `and intersecting the shaft passage and 4formed lvvith'a.- plurality of longitudinally extending 'keyways, bearing members rotatively disposedin thejlast named passages and having a plurality of .concave bearing l*faces of ldifferent curvatures, keyways disposed in said members and adaptedto eoact withithe keyways in the iso passages, keys adapted tobe inserted said `keyways, and means for holding said keys in place comprising set screws passing throughthe hub and intersecting said key-A 4. A rotatable element having a hub formed to provide a shaft passage, apair of passages parallel 'to and intersecting the Vshaft passage and formed with a plurality of longitudinally extending keyways, bearing members rotatively disposed in the last named passages and having a plurality of concave bearinoi faces of different curvatures, keyways disposed in said members and adapted `to coact with thekeyways in the passages, keys adapted to be inserted in said keywa-ys, and means for holding said keys in place comprising set screws passing through the hub and intersectin said keyways, one of saidmembers'being ormed with intersecting passages extending through the member from all of its concave faces and having shaft keywa-ys onl all of its concave faces intersecting said openings, and screws y' adapted to pass' through the hub and pass through said openings in said member and extend'into the shaftvkeyway `whereby to clamp the shaft in any position. f

5. A rotatable element having a hub formed with a shaft passage and having al pair ofpassages extending parallel to but intersecting the shaft passage, said last" n-amed passages having a greater diameter than the shaft passage, bearing members fitting in the last named passages and rotatively disposed therein andl having a plurality olf! [concave bearing faces, of said'concave faces being formed with a longitudi-y nally extending keyWa-y in its bottom and Ythe periphery of the wing between two of said concave faces being formed with a lon, gitudinally extending keyway .adapted to register with any one of the keyways in the shaft passage, keys adapted t0 be inserted in Ysaid keyways to hold the bearing members from rotation and lock'thenr in adjusted positions, set screws extending through the hub and adapted to engage mid keys to prevent detachment therefrom, and means for holdingthe shaft key from detachment.

6. A rotatable `element having v,a hub formed with a centrally disposed shaft passage and with .a pair of passages parallely to but intersecting the shaft ypassage andV4 larger in diameter than the shaft passage and having three equi-distantly spaced, longitudinally extending keyways,` bearing members disposed in said last named passages, each formed to provide a plurality of concavely curved bearing faces, the vouter edge ofthe wall between two of said bearing faces being formed with a longitudinally extending keyway `adapted to register with any one of the keyways in the corresponding bearing passage, the hub havingV screw threaded openings extending inward from the exterior thereof toqsaid 4k'eyway in `-the passages and.v intersect-ingthe sameandv hav.- ing f screw-threaded openings throu "h theinterior of said passagesto one side 0% set screws insertible through saidescrewthreaded passages, and keys4 disposable in said keywa'ys, one ofthe rotatable bearing members being formed lwith keyways :ex-

tending longitudinally of, and atthe bottom ,ofjthe'concavefaces and adapted'fto receive the key of the shaft. j

7 A rotatable element having a hub formed with a diametrically elongated shaft passage, shaft engaging members adapted to be disposed in the ends of said passage on each side of the shaft and rotatable each `in the corresponding end of said passage, V

8. A rotatable element having a diametri-4 cally elongated shaft passage, the opposite ends of the passage being circular in cross extending 7o the adjacent screw-threaded passages, j l

' section, shaft engaging members disposed in Y,

opposite ends of the passage and rotatably adjustable therein and each formed with a plurality of corresponding shaft engaging` seats, each member having seats of different diameters, and means forlocking said bear-` ing members in adjusted positions with their corresponding seats confronting each other.

9, A rotatable element having a .hub formed with a central shaft passageand a pair of passageways parallel to and` intersectin the shaft passage, each of said last name paages having a circumferential groove intermediate the ends of the passage and each of said last named passages having a plurality of longitudinally extending keywaysbearing members disposed in said last named passages and having a plurality of concave faces of different curvatures, each member having a lug on its peripheryadapt-l ed to be engaged insaid groove and having on its lperiphery a longitudinally extending keyway adapted to register with any one of the keyways in the correspondn passage, keys adapted to be inserted in said keyways to thereby hold the bearing members in ro- .tatively vadjusted positions, and means for locking said ke s in lace.

10. A rotata le e ement having a hub 'formed with a central shaft passage and a iso pair of assagewaysparallel to and inter'- rgroove intermediate the ends of the passage and, each of said last named passages having ,a plurality oflongitudinally extending key- .ways, bearing? members disposed in said last named-'passages and `having a pluralityy of concave :faces fof different curvatures, each mem-berhaving alug on its periphery adapted to be engaged'in said groove and having on-itsaperipherya` longitudinally extending 2 the keyways inthe corresponding passage,

keys*l adapted to be-inserted in said keyways to thereby hold the bearngnrnbers in rotatably adjusted positions, means for-flocking l said keys' in-v place5y and means for locking -therotatable member to. a shaft extending through said-hub'. Y

In Vtestimony*'whereof I hereunto affix my MoULToN-L. HUDsoN. 

